Example usage for java.lang.reflect Constructor setAccessible

Introduction

In this page you can find the example usage for java.lang.reflect Constructor setAccessible.

Prototype

@Override
@CallerSensitive
public void setAccessible(boolean flag)

Source Link

Document

A SecurityException is also thrown if this object is a Constructor object for the class Class and flag is true.

Usage

From source file:Main.java

public static String getUserAgentString(Context context) {
    if (userAgent == null) {
        try {//from w ww.  ja v a  2s  . c  om
            Constructor<WebSettings> constructor = WebSettings.class.getDeclaredConstructor(Context.class,
                    WebView.class);
            constructor.setAccessible(true);
            try {
                WebSettings settings = constructor.newInstance(context, null);
                userAgent = settings.getUserAgentString();
            } finally {
                constructor.setAccessible(false);
            }
        } catch (Exception e) {
            userAgent = new WebView(context).getSettings().getUserAgentString();
        }
    }
    return userAgent;
}

From source file:com.abiquo.model.util.ModelTransformer.java

public static <T> T transform(final Class sourceClass, final Class<T> targetClass, final Object template)
        throws Exception {
    Constructor<T> cons = targetClass.getDeclaredConstructor();
    cons.setAccessible(true);
    T instance = cons.newInstance();//from w w w. j  ava2  s  .  co  m

    transform(sourceClass, targetClass, template, instance);
    return instance;
}

From source file:com.hortonworks.minicluster.util.ReflectionUtils.java

/**
 *
 * @param className/*from   w  w w  . ja  v  a2s. c o  m*/
 * @return
 */
public static Object newDefaultInstance(String className) {
    try {
        Class<?> clazz = Class.forName(className);
        Constructor<?> constructor = clazz.getDeclaredConstructor();
        constructor.setAccessible(true);
        //         Object instance = clazz.newInstance();
        Object instance = constructor.newInstance();
        return instance;
    } catch (Exception e) {
        throw new IllegalStateException(
                "Failed to create instance of " + className + " using default constructor", e);
    }
}

From source file:Main.java

public static Object newInstance(String paramString, Object[] paramArrayOfObject) {
    try {/*from  w w  w .j  a  v a2  s  . c o m*/
        Constructor localConstructor = Class.forName(paramString)
                .getDeclaredConstructor(getArgsClasses(paramArrayOfObject));
        localConstructor.setAccessible(true);
        return localConstructor.newInstance(paramArrayOfObject);
    } catch (Exception var3) {
        return null;
    }
}

From source file:com.espertech.esper.util.ConstructorHelper.java

private static Constructor getRegularConstructor(Class clazz, Class parameterTypes[]) {

    // Try to find the matching constructor
    try {/*  ww  w. jav a2s  .c o  m*/
        Constructor ctor = clazz.getConstructor(parameterTypes);

        try {
            ctor.setAccessible(true);
        } catch (SecurityException se) {
            // No action
        }

        return ctor;
    } catch (NoSuchMethodException e) {
        // Thats ok
    }
    return null;
}

From source file:marshalsec.gadgets.C3P0WrapperConnPool.java

public static String makeC3P0UserOverridesString(String codebase, String clazz)
        throws ClassNotFoundException, NoSuchMethodException, InstantiationException, IllegalAccessException,
        InvocationTargetException, IOException {

    ByteArrayOutputStream b = new ByteArrayOutputStream();
    try (ObjectOutputStream oos = new ObjectOutputStream(b)) {
        Class<?> refclz = Class.forName("com.mchange.v2.naming.ReferenceIndirector$ReferenceSerialized"); //$NON-NLS-1$
        Constructor<?> con = refclz.getDeclaredConstructor(Reference.class, Name.class, Name.class,
                Hashtable.class);
        con.setAccessible(true);
        Reference jndiref = new Reference("Foo", clazz, codebase);
        Object ref = con.newInstance(jndiref, null, null, null);
        oos.writeObject(ref);/*  w w w  .j a  v  a2 s.c o m*/
    }

    return "HexAsciiSerializedMap:" + Hex.encodeHexString(b.toByteArray()) + ";"; //$NON-NLS-1$
}

From source file:com.hortonworks.minicluster.util.ReflectionUtils.java

/**
 * // w w w.ja v  a2 s  . co m
 * @param className
 * @return
 */
@SuppressWarnings("unchecked")
public static <T> Constructor<T> getInvocableConstructor(String className, Class<?>... parameterTypes) {
    try {
        Class<?> clazz = Class.forName(className);
        Constructor<T> constructor = (Constructor<T>) clazz.getDeclaredConstructor(parameterTypes);
        constructor.setAccessible(true);
        return constructor;
    } catch (Exception e) {
        throw new IllegalStateException(
                "Failed to create instance of " + className + " using default constructor", e);
    }
}

From source file:com.linkedin.pinot.core.query.scheduler.QuerySchedulerFactory.java

private static @Nullable QueryScheduler getQuerySchedulerByClassName(String className,
        Configuration schedulerConfig, QueryExecutor queryExecutor) {
    try {//from  ww w .  j a  va2s  .  c  om
        Constructor<?> constructor = Class.forName(className).getDeclaredConstructor(Configuration.class,
                QueryExecutor.class);
        constructor.setAccessible(true);
        return (QueryScheduler) constructor.newInstance(new Object[] { schedulerConfig, queryExecutor });
    } catch (Exception e) {
        LOGGER.error("Failed to instantiate scheduler class by name: {}", className, e);
        return null;
    }
}

From source file:com.github.dryangkun.hbase.tidx.hive.HBaseTableSnapshotInputFormatUtil.java

/**
 * Create a bare TableSnapshotRegionSplit. Needed because Writables require a
 * default-constructed instance to hydrate from the DataInput.
 *
 * TODO: remove once HBASE-11555 is fixed.
 *//*w ww .  j a va 2s.  co  m*/
public static InputSplit createTableSnapshotRegionSplit() {
    try {
        assertSupportsTableSnapshots();
    } catch (RuntimeException e) {
        LOG.debug("Probably don't support table snapshots. Returning null instance.", e);
        return null;
    }

    try {
        Class<? extends InputSplit> resultType = (Class<? extends InputSplit>) Class
                .forName(TABLESNAPSHOTREGIONSPLIT_CLASS);
        Constructor<? extends InputSplit> cxtor = resultType.getDeclaredConstructor(new Class[] {});
        cxtor.setAccessible(true);
        return cxtor.newInstance(new Object[] {});
    } catch (ClassNotFoundException e) {
        throw new UnsupportedOperationException("Unable to find " + TABLESNAPSHOTREGIONSPLIT_CLASS, e);
    } catch (IllegalAccessException e) {
        throw new UnsupportedOperationException(
                "Unable to access specified class " + TABLESNAPSHOTREGIONSPLIT_CLASS, e);
    } catch (InstantiationException e) {
        throw new UnsupportedOperationException(
                "Unable to instantiate specified class " + TABLESNAPSHOTREGIONSPLIT_CLASS, e);
    } catch (InvocationTargetException e) {
        throw new UnsupportedOperationException(
                "Constructor threw an exception for " + TABLESNAPSHOTREGIONSPLIT_CLASS, e);
    } catch (NoSuchMethodException e) {
        throw new UnsupportedOperationException(
                "Unable to find suitable constructor for class " + TABLESNAPSHOTREGIONSPLIT_CLASS, e);
    }
}

From source file:libepg.epg.section.sdt.ClassGetter.java

public static ServiceDescriptionTableRepeatingPart init(byte[] data) throws Throwable {
    try {//from   w w  w .j a va  2s. co m
        Object[] args = { data };
        Class<?>[] params = { byte[].class };
        Constructor<ServiceDescriptionTableRepeatingPart> constructor = ServiceDescriptionTableRepeatingPart.class
                .getDeclaredConstructor(params);
        constructor.setAccessible(true);
        ServiceDescriptionTableRepeatingPart target = constructor.newInstance(args);
        return target;
    } catch (InstantiationException | IllegalAccessException | IllegalArgumentException
            | SecurityException ex) {
        LOG.fatal(ex);
    } catch (InvocationTargetException ex) {
        throw ex.getCause();
    }
    return null;
}